Granted Patent
Utility
US 4,609,720 · App. 06/683,517
Wholly aromatic polyester
Inventors:
Tamotsu Yoshimura, Masahiko Nakamura
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Dec 19, 1984
Inventors
Tamotsu Yoshimura
Masahiko Nakamura
Assignee (at issue)
Mitsubishi Chemical Industries, Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.